EP3438800A1 - Corps de câblage, carte de circuit imprimé et capteur tactile - Google Patents

Corps de câblage, carte de circuit imprimé et capteur tactile Download PDF

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Publication number
EP3438800A1
EP3438800A1 EP17775404.1A EP17775404A EP3438800A1 EP 3438800 A1 EP3438800 A1 EP 3438800A1 EP 17775404 A EP17775404 A EP 17775404A EP 3438800 A1 EP3438800 A1 EP 3438800A1
Authority
EP
European Patent Office
Prior art keywords
conductor portion
conductor
resin
wiring body
end surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17775404.1A
Other languages
German (de)
English (en)
Other versions
EP3438800A4 (fr
Inventor
Hiroyuki Hirano
Shingo Ogura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujikura Ltd filed Critical Fujikura Ltd
Publication of EP3438800A1 publication Critical patent/EP3438800A1/fr
Publication of EP3438800A4 publication Critical patent/EP3438800A4/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present invention relates to a wiring body, a wiring board, and a touch sensor.
  • the metal thin wire configuring the electrode pattern of the touch panel of Patent Document 1 is in a flared shape as with Patent Document 2, the metal thin wire is easily visible, and thus, the combination pattern glares, and visibility of the touch panel decreases.
  • An object of the present invention is to provide a wiring body, a wiring board, and a touch sensor which are capable of improving visibility.
  • the tip end of the first conductor portion is not in a flared shape. For this reason, the first conductor portion is hardly visible, and thus, it is possible to improve visibility of the wiring body.
  • Fig. 1 is a plan view illustrating a touch sensor in one embodiment of the present invention
  • Fig. 2 is an exploded perspective view illustrating a wiring board in one embodiment of the present invention
  • Fig. 3 is a partially enlarged view of part III of Fig. 1
  • Fig. 4 is a cross-sectional view along line IV-IV of Fig. 3
  • Fig. 5 is a cross-sectional view for illustrating a first conductor portion in one embodiment of the present invention
  • Fig. 6 is a perspective view in which a tip end of the first conductor portion in one embodiment of the present invention is seen from the upper side
  • Fig. 7 is a cross-sectional view along line VII-VII of Fig. 3 .
  • a touch sensor 1 including a wiring board 2 of this embodiment is a projection electrostatic capacitance type touch panel sensor, and for example, is used as an input device having a function of detecting a touch position by being combined with a display device (not illustrated) or the like.
  • the display device is not particularly limited, and a liquid crystal display, an organic EL display, electronic paper, or the like can be used.
  • a detection electrode and a driving electrode are disposed to overlap with the image to be projected onto the display device, and a predetermined voltage is periodically applied two between two electrodes 67 and 87 from an external circuit (not illustrated).
  • a touch sensor 1 for example, in a case where a finger of a operator (an external conductor) is close to the touch sensor 1, a capacitor (electrostatic capacitance) is formed between the external conductor and the touch sensor 1, and an electrical state between two electrodes is changed.
  • the touch sensor 1 is capable of detecting an operating position of the operator on the basis of an electrical change between two electrodes.
  • the "touch sensor 1" in this embodiment corresponds to an example of the "touch sensor” in the present invention
  • the “wiring board 2" in this embodiment corresponds to an example of the "wiring board” in the present invention.
  • the wiring board 2 includes a substrate 3 and a wiring body 4.
  • the wiring board 2 of this embodiment is configured to have transparency (light transmittance) as a whole in order to ensure visibility of the display device.
  • the substrate 3 is a transparent plate-like substrate which is capable of transmitting a visible light ray, and supports the wiring body 4.
  • An easily adhesive layer or an optical adjusting layer may be formed on the substrate 3.
  • the "substrate 3" in this embodiment corresponds to an example of the "support body” in the present invention.
  • the wiring body 4 includes a first resin portion 5, a first conductor portion 6, a second resin portion 7, and a second conductor portion 8.
  • the first resin portion 5, the first conductor portion 6, the second resin portion 7 and the second conductor portion 8 are sequentially laminated from the substrate 3 side.
  • the “wiring body 4" in this embodiment corresponds to an example of the "wiring body” in the present invention
  • the "first resin portion 5" in this embodiment corresponds to an example of the "first resin portion” in the present invention
  • the “first conductor portion 6" in this embodiment corresponds to an example of the “first conductor portion” in the present invention
  • the “second resin portion 7" in this embodiment corresponds to an example of the “second resin portion” in the present invention
  • the “second conductor portion 8" in this embodiment corresponds to an example of the "second conductor portion” in the present invention.
  • the first resin portion 5 is disposed to hold the first conductor portion 6, and for example, is made of an insulating material such as an UV curable resin, a thermosetting resin, or a thermoplastic resin such as an epoxy resin, an acrylic resin, a polyester resin, a urethane resin, a vinyl resin, a silicone resin, a phenolic resin or a polyimide resin, or a green sheet.
  • an insulating material such as an UV curable resin, a thermosetting resin, or a thermoplastic resin such as an epoxy resin, an acrylic resin, a polyester resin, a urethane resin, a vinyl resin, a silicone resin, a phenolic resin or a polyimide resin, or a green sheet.
  • the first resin portion 5 includes a first flat portion 51 and a first convex portion 52.
  • the first flat portion 51 is a portion of the first resin portion 5 which is formed in the shape of a layer.
  • a first upper surface 511 of the first flat portion 51 is approximately even. It is preferable that the thickness of the first flat portion 51, for example, is 5 ⁇ m to 100 ⁇ m.
  • the first convex portion 52 is provided on the first flat portion 51 and is integrally formed with the first flat portion 51.
  • the first convex portion 52 is disposed corresponding to the first conductor portion 6 and supports the first conductor portion 6.
  • the first convex portion 52 protrudes towards the first conductor portion 6 side from the first flat portion 51 in a width direction cross section of the first conductor portion 6.
  • a height T 3 of the first convex portion 52 is preferably 100 nm to 10 ⁇ m, and is more preferably 500 nm to 5 ⁇ m. It is preferable that a width W 6 of the first convex portion 52 (the maximum width) is less than or equal to 50 ⁇ m.
  • the first convex portion 52 is formed in the shape of a straight line along an extending direction of the first conductor portion 6 (hereinafter, also referred to a "first extending direction").
  • a convex portion end surface 522 is formed at a tip end of the first convex portion 52 in the first extending direction.
  • the convex portion end surface 522 is inclined to protrude to the outside of the first convex portion 52 as being close to the first flat portion 51 in a cross section along the first extending direction (a first extending direction cross section).
  • the "convex portion end surface 522" in this embodiment corresponds to an example of the "third end surface" in the present invention.
  • the first convex portion 52 includes a first resin portion contact surface 521 which is in contact with the first conductor portion 6 (specifically, a first conductor portion contact surface 61 (described below)).
  • the first resin portion contact surface 521 has an unevenness shape which is complementary with respect to an unevenness shape of the first conductor portion contact surface 61.
  • the first resin portion contact surface 521 and the first conductor portion contact surface 61 also have a complementary unevenness shape in the first extending direction cross section of the first conductor portion 6.
  • the unevenness shape of the first resin portion contact surface 521 and the first conductor portion contact surface 61 is exaggerated.
  • the "extending direction cross section of the conductor portion” indicates the cross section of the conductor portion at the time of cutting a virtual straight line which passes through the center of the conductor portion in the plan view and extends in the extending direction.
  • the "width direction cross section of the conductor portion” indicates the cross section of the conductor portion at the time of cutting a virtual straight line which extends in a direction orthogonal to the extending direction of the conductor portion in the plan view.
  • a plurality of first conductor portions 6 are disposed on the first resin portion 5, and a first conductor pattern 66 is configured of the plurality of first conductor portions 6.
  • the first conductor pattern 66 includes a plurality of first electrodes 67, a plurality of first lead-out wirings 68 and a plurality of first terminals 69.
  • the first electrode 67 is formed of the plurality of first conductor portions 6 into the shape of a reticulation.
  • the first electrode 67 includes: first wide portions 671 in a diamond shape; and first joining portions 672 each of which connects the first wide portions 671 to each other.
  • the plurality of first wide portions 671 are arranged along an X direction at substantially regular intervals, and the corners of the adjacent first wide portions 671 are connected to each other by the first joining portion 672.
  • the first wide portion 671 is illustrated by four sides which are in the shape of a straight line, but as illustrated in the partially enlarged view of Fig. 1 , in actual fact, tip ends of the first conductor portions 6 protrude into the shape of a comb on each side of the first wide portion 671.
  • the shape of the first wide portion 671 is not particularly limited to a diamond shape.
  • the plurality of first electrodes 67 are parallel in a Y direction in the drawing.
  • Each of the first lead-out wirings 68 is connected to one longitudinal direction end of each of the first electrodes 67.
  • Each of the first lead-out wirings 68 extends from one longitudinal direction end of each of the first electrodes 67to the vicinity of the outer edge of the wiring body 4.
  • Each of the first terminals 69 is disposed on the other end of each of the first lead-out wirings 68.
  • the first terminal 69 is electrically connected to an external circuit (not illustrated).
  • each reticulation configuring a reticular shape of the first electrode 67 is not particularly limited.
  • the shape of the reticulation may be a triangle such as an equilateral triangle, an isosceles triangle and a rectangular triangle, or may be a quadrangle such as a parallelogram and a trapezoid.
  • the shape of the reticulation may be an n-sided polygon such as a hexagon, an octagon, a dodecagon and an icosagon, a circle, an ellipse, a star or the like.
  • a geometric pattern obtained by repeating various diagram units can be used as the shape of each reticulation of the first electrode 77.
  • the first lead-out wiring 68 and the first terminal 69 may be in a reticular shape, as with the first electrode 67.
  • the first conductor portion 6 of this embodiment will be described.
  • the first conductor portion 6 is in the shape of a straight line and is formed so as to have a substantially constant height in the first extending direction.
  • the plurality of first conductor portions 6 intersect with each other, and thus, the reticular shape described above is formed.
  • the first conductor portion 6 may be in a curve shape, a horseshoe shape, a zigzag line shape or the like, as long as the first conductor line 6 linearly extends.
  • the width of the first conductor portion 6 may be changed along the first extending direction.
  • the width of the first conductor portion 6 (the maximum width) is preferably 50 nm to 1000 ⁇ m, is more preferably 500 nm to 150 ⁇ m, is even more preferably 1 ⁇ m to 10 ⁇ m, and is still more preferably 1 ⁇ m to 5 ⁇ m.
  • a height T 1 of the first conductor portion 6 is preferably 50 nm to 3000 ⁇ m, is more preferably 500 nm to 450 ⁇ m, and is even more preferably 500 nm to 10 ⁇ m.
  • the height T 1 of the first conductor portion 6 is greater than a height T 3 of the first convex portion 52.
  • an aspect ratio of the first conductor portion 6 (a ratio between the width of the first conductor portion 6 and the height of the first conductor portion 6) is greater than 1, in terms of making conductivity and visibility compatible.
  • the height of the first conductor portion 6 is a distance between the first conductor portion contact surface 61 (an average surface) and a first conductor portion top surface 62 (described below) along a Z direction.
  • the first conductor portion 6 includes: a binder resin; and conductive particles (a conductive powder) dispersed in the binder resin.
  • a metal material such as silver, copper, nickel, tin, bismuth, zinc, indium and palladium, and a carbon-based material such a graphite, carbon black (furnace black, acetylene black, and ketchen black), a carbon nanotube, and a carbon nanofiber can be exemplified as the conductive particles.
  • a metal salt which is a salt of the metal-based material described above may be used instead of the conductive particles.
  • conductive particles having a particle diameter ⁇ of greater than or equal to 0.5 ⁇ m and less than or equal to 2 ⁇ m can be used as the conductive particles contained in the first conductor portion 6, according to the width of the first conductor portion 6 to be formed. It is preferable to use conductive particles having an average particle diameter ⁇ of less than or equal to half of the width of the first conductor portion 6 to be formed, in terms of stabilizing an electrical resistance value of the first conductor portion 6. It is preferable to use particles having a specific surface area of greater than or equal to 20 m 2 /g, which is measured by a BET method, as the conductive particles.
  • the first conductor portion 6 requires a comparatively small electrical resistance value which is less than or equal to a certain value, it is preferable that a metal material is used as the conductive particles.
  • a metal material is used as the conductive particles.
  • a carbon-based material is used as the conductive particles. It is preferable that the carbon-based material is used as the conductive particles, in terms of improving a haze or total light reflectance of a mesh film.
  • a conductive material which has excellent conductivity but is opaque an opaque metal material and an opaque carbon-based material
  • a metal material such as silver, copper and nickel
  • the carbon-based material described above can be used as a conductive material of which the first conductor portion 6 of the first electrode 67 is made.
  • An acrylic resin, a polyester resin, an epoxy resin, a vinyl resin, a urethane resin, a phenolic resin, a polyimide resin, a silicone resin, a fluorine resin and the like can be exemplified as the binder resin.
  • the binder resin may be omitted from the material of which the first conductor portion 6 is made.
  • the first conductor portion 6 is formed by being coated with a conductive paste and by curing the conductive paste.
  • a conductive paste which is made by mixing conductive particles, a binder resin, water or a solvent, and various additives can be exemplified as a specific example of the conductive paste.
  • ⁇ -Terpineol, butyl carbitol acetate, butyl carbitol, 1-decanol, butyl cellosolve, diethylene glycol monoethyl ether acetate, tetradecane and the like can be exemplified as the solvent contained in the conductive paste.
  • the first conductor portion 6 includes the first conductor portion contact surface 61, the first conductor portion top surface 62, a first conductor portion side surface 63, a first conductor portion end surface 64 and a first protruding portion 65.
  • first conductor portion contact surface 61" in this embodiment corresponds to an example of the “contact surface” in the present invention
  • first conductor portion top surface 62" in this embodiment corresponds to an example of the “top surface” in the present invention
  • first conductor portion end surface 64" in this embodiment corresponds to an example of the “first end surface” in the present invention
  • first protruding portion 65" in this embodiment corresponds to an example of the “protruding portion” in the present invention.
  • the first conductor portion contact surface 61 is a surface which is in contact with the first resin portion contact surface 521 and extends in parallel with the first extending direction.
  • the first conductor portion contact surface 61 is in an unevenness shape.
  • the unevenness shape is formed on the basis of surface roughness of the first conductor portion contact surface 61.
  • the surface roughness of the first conductor portion contact surface 61 will be described below in detail.
  • the first conductor portion top surface 62 is a surface on a side opposite to the first conductor portion contact surface 61 in the first conductor portion 6 and extends in parallel with the first extending direction.
  • the first conductor portion top surface 62 of this embodiment includes a first top surface flat portion 621 which is linear.
  • the width of the first top surface flat portion 621 is greater than or equal to half of the width of the first conductor portion top surface 62 in the width direction cross section of the first conductor portion 6.
  • a portion excluding the circumference of the first conductor portion top surface 62 is the first top surface flat portion 621.
  • a flatness of the first top surface flat portion 621 is less than or equal to 0.5 ⁇ m. The flatness can be defined by a JIS method (JIS B0621 (1984)).
  • the flatness of the first top surface flat portion 621 is obtained by a non-contact type measurement method using laser light. Specifically, a measurement target is irradiated with strip-like laser light, and an image is formed on an imaging device (for example, a two-dimensional CMOS) by reflection light thereof, and thus, the flatness is measured.
  • an imaging device for example, a two-dimensional CMOS
  • a calculation method of the flatness a method in which a plane passing through three points maximally separated from each other is set in a target surface, and a maximum value of a deviation thereof is calculated as the flatness (a maximum deflection flatness) is used.
  • the measurement method or the calculation method of the flatness is not particularly limited to the above description.
  • the measurement method of the flatness may be a contact type measurement method using a dial gauge or the like.
  • the calculation method of the flatness a method in which a value of a gap formed at the time of interposing a target surface between parallel planes is calculated as the flatness (a maximum inclination type flatness) may be used.
  • the first protruding portion 65 is continuously formed along the circumference of the first conductor portion top surface 62.
  • the first protruding portion 65 protrudes towards a side separated from the first resin portion 5.
  • the first protruding portion 65 is continuously formed.
  • the first protruding portion 65 exists on both ends of the first conductor portion top surface 62, and the first top surface flat portion 621 is formed and between the first protruding portions 65 and 65.
  • the first protruding portion 65 and the first top surface flat portion 621 are continuously connected to each other in the width direction cross section of the first conductor portion 6.
  • the height of the first protruding portion 65 (the height of the first protruding portion 65 from the first conductor portion top surface 62) is 0.1 ⁇ m to 1.0 ⁇ m. It is preferable that the width of the first protruding portion 65 (a distance between both ends of the first protruding portion 65 positioned on a first virtual straight line L 1 extending on the first conductor portion top surface 62 (the first top surface flat portion 621)) is 0.1 ⁇ m to 1.0 ⁇ m.
  • the first conductor portion side surface 63 is interposed between the first conductor portion contact surface 61 and the first conductor portion top surface 62.
  • the first conductor portion side surface 63 is connected to the first conductor portion top surface 62 at a first side surface upper end 631 through the first protruding portion 65 and is connected to the first conductor portion contact surface 61 at a first side surface lower end 632.
  • the first side surface upper end 631 corresponds to a portion in which the first virtual straight line L 1 and a second virtual straight line L 2 extending on the first conductor portion side surface 63 (a first side surface flat portion 633 (described below)) intersect with each other in the width direction cross section of the first conductor portion 6.
  • the first conductor portion side surface 63 and a side surface of the first convex portion 52 are continuously connected to each other and form one surface.
  • Two first conductor portion side surfaces 63 and 63 in one first conductor portion 6 are inclined to be close to the center of the first conductor portion 6 as being separated from the first resin portion 5.
  • the first conductor portion 6 is in a tapered shape in which the first conductor portion 6 is narrowed as being separated from the first resin portion 5 in the width direction cross section of the first conductor portion 6.
  • the first conductor portion side surface 63 includes the first side surface flat portion 633 which is linear and extends between the first side surface upper end 631 and the first side surface lower end 632 in the width direction cross section of the first conductor portion 6.
  • a flatness of the first side surface flat portion 633 is less than or equal to 0.5 ⁇ m.
  • an approximately entire of the first conductor portion side surface 63 is the first side surface flat portion 633.
  • An angle ⁇ 1 between the first conductor portion side surface 63 and the first conductor portion top surface 62 is preferably 90° to 170° (90° ⁇ ⁇ 1 ⁇ 170°), is more preferably 90° to 135° (90° ⁇ ⁇ 1 ⁇ 135°), and is even more preferably 90° to 120° (90° ⁇ ⁇ 1 ⁇ 120°), in terms of suppressing scattering of light on the first conductor portion side surface 63.
  • an angle between one first conductor portion side surface 63 and the first conductor portion top surface 62, and an angle between the other first conductor portion side surface 63 and the first conductor portion top surface 62 are substantially equal to each other in one first conductor portion 6.
  • the angle ⁇ 1 indicates an angle between the first virtual straight line L 1 and the second virtual straight line L 2 .
  • the first conductor portion end surface 64 extending in a direction intersecting with the first extending direction is formed at a tip end of the first conductor portion 6 in the first extending direction.
  • the first conductor portion end surface 64 may be formed at both tip ends of the first conductor portion 6, or may be formed at only one tip end.
  • the first conductor portion end surface 64 is connected to the first conductor portion top surface 62 at a first end surface upper end 641 through the first protruding portion 65 and is connected to the first conductor portion contact surface 61 at a first end surface lower end 642.
  • the first end surface upper end 641 corresponds to a portion in which a third virtual straight line L 3 extending on the first conductor portion top surface 62 (the first top surface flat portion 621) and a fourth virtual straight line L 4 extending on the first conductor portion end surface 64 intersect with each other in the first extending direction cross section of the first conductor portion 6.
  • the first end surface lower end 642 protrudes to the outside of the first conductor portion 6 with respect to the first end surface upper end 641 in the first extending direction cross section of the first conductor portion 6, and thus, the first conductor portion end surface 64 is an inclined surface which is inclined in a straight line shape between the first end surface upper end 641 and the first end surface lower end 642.
  • the first conductor portion end surface 64 is continuously connected to the convex portion end surface 522 of the first convex portion 52, and the first conductor portion end surface 64 and the convex portion end surface 522 form one surface in the wiring body 4.
  • An angle ⁇ 2 between the first conductor portion end surface 64 and the first conductor portion top surface 62 is 90° to 135° (90° ⁇ ⁇ 2 ⁇ 135°), and is preferably 90° to 120° (90° ⁇ ⁇ 2 ⁇ 120°).
  • the angle ⁇ 2 is an angle between the third virtual straight line L 3 and the fourth virtual straight line L 4 .
  • the first length W 1 corresponds to a distance between the first end surface upper end 641 and the first end surface lower end 642 in the first extending direction.
  • the first conductor portion end surface 64 includes first arc portions 643 and 643 respectively connected to the first conductor portion side surfaces 63 and 63.
  • the first arc portion 643 is curved towards the outside of the first conductor portion 6.
  • a portion of the first conductor portion end surface 64 between the first arc portions 643 and 643 is approximately flat.
  • the first conductor portion end surface 64 has a semi-oval shape in the plan view.
  • the first arc portions 643 and 643 are directly connected to each other.
  • the first conductor portion end surface 64 has a semi-circular shape in the plan view.
  • first arc portion 643 in this embodiment corresponds to an example of the "arc portion” in the present invention.
  • a relationship between the first length W 1 and a length W 2 obtained by projecting the first conductor portion side surface 63 on a plane parallel to the width direction of the first conductor portion 6 (hereinafter, also referred to as a "second length W 2 ", refer to Fig. 4 ) satisfies a relationship of Expression (7) described below. For this reason, a side portion of the first conductor portion 6 has a precipitous shape in the Z direction with respect to the first upper surface 511 of the first flat portion 51, as with the tip end of the first conductor portion 6. In this case, the angle ⁇ 1 and the angle ⁇ 2 are substantially equal to each other.
  • W 1 W 2
  • the second length W 2 corresponds to a distance between the first side surface upper end 631 and the first side surface lower end 632 in the width direction of the first conductor portion 6.
  • the surface roughness of the first conductor portion contact surface 61 is relatively greater than surface roughness of the first conductor portion top surface 62, in terms of rigidly fixing the first conductor portion 6 to the first resin portion 5 while improving visibility of the wiring body.
  • the first conductor portion top surface 62 includes the first top surface flat portion 621, a relative relationship of the surface roughness in the first conductor portion 6 described above (a relationship in which the surface roughness of the first conductor portion top surface 62 is relatively greater than the surface roughness of the first conductor portion contact surface 61) is established.
  • surface roughness Ra of the first conductor portion contact surface 61 is 0.1 ⁇ m to 3 ⁇ m, whereas surface roughness Ra of the first conductor portion top surface 62 is 0.001 ⁇ m to 1.0 ⁇ m. It is more preferable that the surface roughness Ra of the first conductor portion contact surface 61 is 0.1 ⁇ m to 0.5 ⁇ m, and it is more preferable that the surface roughness Ra of the first conductor portion top surface 62 is 0.001 ⁇ m to 0.3 ⁇ m.
  • a relationship of the surface roughness of the first conductor portion top surface 62 with respect to the surface roughness of the first conductor portion contact surface 61 is preferably greater than or equal to 0.01 and less than 1, and is more preferably greater than or equal to 0.1 and less than 1. It is preferable that the surface roughness of the first conductor portion top surface 62 is less than or equal to 1/5 of the width of the first conductor portion 6 (the maximum width). Such surface roughness can be measured by a JIS method (JIS B0601 (revised on March 21, 2013)). The surface roughness of the first conductor portion contact surface 61 and the surface roughness of the first conductor portion top surface 62 may be measured along the width direction of the first conductor portion 6, or may be measured along the extending direction of the first conductor portion 6.
  • the "surface roughness Ra” indicates “arithmetic average roughness Ra”.
  • the "arithmetic average roughness Ra” indicates a roughness parameter which is obtained by blocking a long wavelength component (a waviness component) from a sectional curve.
  • the waviness component is separated from the sectional curve on the basis of a measurement condition necessary for obtaining a feature (for example, a dimension or the like of the target).
  • the first conductor portion side surface 63 also includes the first side surface flat portion 633.
  • the surface roughness of the first conductor portion contact surface 61 is relatively greater than the surface roughness of the first conductor portion side surface 63.
  • the surface roughness Ra of the first conductor portion contact surface 61 is 0.1 ⁇ m to 3 ⁇ m, whereas surface roughness Ra of the first conductor portion side surface 63 is preferably 0.001 ⁇ m to 1.0 ⁇ m, and is more preferably 0.001 ⁇ m to 0.3 ⁇ m.
  • the surface roughness of the first conductor portion side surface 63 may be measured along the width direction of the first conductor portion 6, or may be measured along the extending direction of the first conductor portion 6.
  • the surface roughness of the first conductor portion contact surface 61 is relatively greater than the surface roughness of the first conductor portion end surface 64.
  • the surface roughness Ra of the first conductor portion contact surface 61 is 0.1 ⁇ m to 3 ⁇ m
  • surface roughness Ra of the first conductor portion end surface 64 is preferably 0.001 ⁇ m to 1.0 ⁇ m, and is more preferably 0.001 ⁇ m to 0.3 ⁇ m.
  • the surface roughness of the first conductor portion end surface 64 may be measured along the width direction of the first conductor portion 6, or may be measured along the extending direction of the first conductor portion 6.
  • a diffused reflection rate on the surface side other than the first conductor portion contact surface 61 is less than a diffused reflection rate on the first conductor portion contact surface 61 side.
  • a ratio of the diffused reflection rate on the surface side other than the first conductor portion contact surface 61 to the diffused reflection rate on the first conductor portion contact surface 61 side is preferably greater than or equal to 0.1 and less than 1, and is more preferably greater than or equal to 0.3 and less than 1.
  • FIG. 5 An example of the shape of the first conductor portion having the described above relative relationship in the surface roughness between the first conductor portion contact surface and the surface other than the first conductor portion contact surface will be described with reference to Fig. 5 .
  • the second resin portion 7 is not illustrated.
  • a part of the conductive particles M protrudes from the binder resin B in a width direction cross section of the first conductor portion 6B. Accordingly, the first conductor portion contact surface 61B has an unevenness shape.
  • the binder resin B enters between the conductive particles M in the width direction cross section of the first conductor portion 6B.
  • a slightly exposed portion of the conductive particles M is scattered on the first conductor portion top surface 62B and the first conductor portion side surface 63B, but the binder resin B covers the conductive particles M.
  • the first conductor portion top surface 62B includes a first top surface flat portion 621B
  • the first conductor portion side surface 63B includes a first side surface flat portion 633B.
  • the binder resin B enters between the conductive particles M at the first conductor portion end surface.
  • surface roughness of the first conductor portion contact surface 61B is relatively greater than surface roughness of the first conductor portion top surface 62B, is relatively greater than surface roughness of the first conductor portion side surface 63B, and is relatively greater than the surface roughness of the first conductor portion end surface.
  • the binder resin B covers the conductive particles M at the first conductor portion side surface 63B and the first conductor portion end surface, and thus, electrical insulating properties between the adjacent first conductor portions 6B are improved, and the occurrence of migration is suppressed.
  • the shape of the first conductor portion is not limited to the above description.
  • the first conductor portion 6 configuring the first electrode 67, the first conductor portion 6 configuring the first lead-out wiring 68, and the first conductor portion 6 configuring the first terminal 69 may be in the same shape, or may be in different shapes.
  • the width of the first conductor portion 6 configuring the first electrode 67, the width of the first conductor portion 6 configuring the first lead-out wiring 68, and the width of the first conductor portion 6 configuring the first terminal 69 may be equal to each other, or may be different from each other.
  • the height of the first conductor portion 6 configuring the first electrode 67, the height of the first conductor portion 6 configuring the first lead-out wiring 68, and the height of the first conductor portion 6 configuring the first terminal 69 may be equal to each other, or may be different from each other.
  • the second resin portion 7 is disposed to cover the first conductor portion 6 and is interposed between the first and second conductor portions 6 and 8.
  • the second resin portion 7 functions as a dielectric body which exists between two electrodes 67 and 87 of the touch sensor 1. The thickness of the second resin portion 7 is adjusted, and thus, a detection sensitivity of the touch sensor 1 is adjusted.
  • the second resin portion 7 includes a second flat portion 71 which is formed in the shape of a layer and a second convex portion 72.
  • the second flat portion 71 directly covers the first conductor portion 6 and directly covers the first upper surface 511 of the first resin portion 5.
  • the first terminal 69 is exposed from a rectangular cutout formed on one side of the second flat portion 71 (refer to Fig. 1 and Fig. 2 ).
  • a second upper surface 711 of the second flat portion 71 is approximately flat. It is preferable that the thickness of the second flat portion 71, for example, is 20 ⁇ m to 200 ⁇ m.
  • the second convex portion 72 is provided on the second flat portion 71 and is integrally formed with the second flat portion 71.
  • the second convex portion 72 is disposed corresponding to the second conductor portion 8 and supports the second conductor portion 8.
  • the second convex portion 72 protrudes towards the second flat portion 71 side from the second conductor portion 8 in a width direction cross section of the second conductor portion 8.
  • the second convex portion 72 includes a second resin portion contact surface 721 which is in contact with the second conductor portion 8 (specifically, a second conductor portion contact surface 81).
  • the second resin portion contact surface 721 has an unevenness shape which is complementary with respect to an unevenness shape of the second conductor portion contact surface 81.
  • the second resin portion contact surface 721 and the second conductor portion contact surface 81 have also a complementary unevenness shape in a cross section of the second conductor portion 8 along the extending direction of the second conductor portion 8.
  • the unevenness shape of the second resin portion contact surface 721 and the second conductor portion contact surface 81 is exaggerated.
  • a plurality of second conductor portions 8 are disposed on the second resin portion 7, and a second conductor pattern 86 is configured of the plurality of second conductor portions 8.
  • the second conductor pattern 86 includes the second electrode 87, a second lead-out wiring 88 and a second terminal 89.
  • the second electrode 87 is formed of the plurality of second conductor portions 8 into the shape of a reticulation.
  • the second electrode 87 includes: second wide portions 871 in a diamond shape; and second joining portions 872 each of which connects the second wide portions 871 with each other.
  • the second wide portions 871 are arranged along the Y direction at substantially regular intervals, and the corners of the adjacent second wide portions 871 are connected to each other by the second joining portion 872.
  • the second wide portion 871 is illustrated by four sides which are in the shape of a straight line, but as illustrated in the partially enlarged view of Fig. 1 , in actual fact, tip ends of the second conductor portions 8 protrude into the shape of a comb on each side of the second wide portion 871.
  • the shape of the second wide portion 871 is not particularly limited to a diamond shape.
  • the plurality of second electrode 87 are parallel in the X direction in the drawing.
  • Each of the second lead-out wirings 88 is connected to one longitudinal direction end of each of the second electrodes 87.
  • Each of the second lead-out wirings 88 extends from one longitudinal direction end of each of the second electrodes 87 to the vicinity of the outer edge of the wiring body 4.
  • Each of the second terminals 89 is disposed on the other end of each of the second lead-out wirings 88.
  • the second terminal 89 is electrically connected to an external circuit (not illustrated).
  • each reticulation configuring the reticular shape of the first electrode 67 can be adopted as the shape of each reticulation configuring the reticular shape of the second electrode 87.
  • the second lead-out wiring 88 or the second terminal 89 may be in a reticular shape.
  • the second conductor portion 8 of this embodiment has the same basic configuration as that of the first conductor portion 6 described above. Therefore, the width of the second conductor portion 8 is substantially equal to the width of the first conductor portion 6, and the height of the second conductor portion 8 is substantially equal to the height of the first conductor portion 6.
  • the first conductor portion 6 will be replaced with the second conductor portion 8
  • the first conductor portion contact surface 61 will be replaced with the second conductor portion contact surface 81
  • the first conductor portion top surface 62 will be replaced with a second conductor portion top surface 82
  • the first conductor portion side surface 63 will be replaced with a second conductor portion side surface 83
  • the first top surface flat portion 621 will be replaced with a second top surface flat portion 821
  • the first side surface upper end 631 will be replaced with a second side surface upper end 831
  • the first side surface lower end 632 will be replaced with a second side surface lower end 832
  • the first side surface flat portion 633 will be replaced with a second side surface flat portion 833
  • the first conductor portion end surface 64 will be replaced with a second conductor portion end surface 84
  • the first end surface upper end 641 will be replaced with a second end surface upper end 841
  • the first end surface lower end 642 will be replaced with a second
  • components other than the first and second conductor portions 6 and 8 configuring the wiring board 2 are made of a material having transparency (light transmittance) as a whole.
  • the first and second conductor patterns 66 and 86 are disposed by being separated from each other by the thickness of the second resin portion 7 in the Z direction, but in a case of viewing the wiring board 2 from the plane surface, the first and second electrodes 67 and 87 are combined with each other, and thus, an integrated electrode pattern described below is formed on appearance. That is, as illustrated in Fig.
  • the second wide portion 871 is disposed to correspond to a region which is defined by the first wide portions 671, the first and second wide portions 671 and 871 are disposed not to overlap with each other, but the first joining portion 672 and second joining portion 872 intersect with each other to overlap with each other.
  • a Side of the first wide portion 671 and a side of the second wide portion 871 adjacent to the first wide portion 671 face each other in the see-through plan view.
  • the first conductor portion 6 whose the tip end protrudes from the side of the first wide portion 671 and the second conductor portion 8 whose the tip end protrudes from the side of the second wide portion 871 facing the side of the first wide portion 671 are positioned on the same fifth virtual straight line L 5 in the see-through plan view.
  • the first extending direction and an extending direction of the second conductor portion 8 (hereinafter, also referred to as a "second extending direction”) substantially match with each other.
  • the first and second conductor portions end surfaces 64 and 84 are disposed to face each other without overlapping with each other in the see-through plan view. In this embodiment, the first and second conductor portions end surfaces 64 and 84 are slightly separated from each other, but the first and second conductor portions 6 and 8 form one continuous straight line on appearance.
  • the first and second conductor portions 6 and 8 satisfy a relationship of Expression (10) and Expression (11) described below, in terms of improving the visibility of the wiring body 4.
  • W 3 is a length which is the shortest length (hereinafter, also referred to as a "third length”) of lengths obtained by projecting an interval between the first and second conductor portions end surfaces 64 and 84 on a plane parallel to an extending direction of the fifth virtual straight line L 5 (hereinafter, also referred to as a "third extending direction”)
  • W 4 is a length which is the longest length (hereinafter, also referred to as a "fourth length") of the lengths obtained by projecting the interval between the first and second conductor portions end surfaces 64 and 84 on the plane parallel to the third extending direction.
  • the third length W 3 corresponds to a distance between the first end surface lower end 642 and the second end surface lower end 842 in the third extending direction (refer to Fig. 7 ).
  • the fourth length W 4 corresponds to a distance between the first end surface upper end 641 and the second end surface upper end 841 in the third extending direction (refer to Fig. 7 ).
  • Fig. 8(A) to Fig. 8(E) and Fig. 9(A) to Fig. 9(E) are cross-sectional views for illustrating a manufacturing method of a wiring body in one embodiment of the present invention.
  • a first intaglio 100 on which a concave portion 101 having a shape corresponding to the shape of the first conductor portion 6 is formed is filled with a first conductive material 110.
  • the conductive paste described above is used as the first conductive material 110 filling the concave portion 101 of the first intaglio 100.
  • Silicon, nickel, glasses such as silicon dioxide, ceramics, organic silicas, glassy carbon, a thermoplastic resin, a photocurable resin and the like can be exemplified as a material of which an intaglio 11 is made.
  • a release layer made of a black lead-based material, a silicone-based material, a fluorine-based material, a ceramic-based material, an aluminum-based material or the like is formed on a surface of the concave portion 101 in order to improve releasability.
  • a dispense method, an ink jet method, or a screen printing method can be exemplified as a method of filling the concave portion 101 of the first intaglio 100 with the first conductive material 110.
  • a method of wiping, scraping, sucking, sticking, rinsing or blowing the first conductive material 110 which is applied to a portion other than the concave portion 101 after performing coating by a slit coating method, a bar coating method, a blade coating method, a dip coating method, a spray coating method, or a spin coating method can be exemplified.
  • the filling method can be suitably used according to the composition of the conductive material 110, the shape of the first intaglio 100 or the like.
  • the first conductive material 110 filling the concave portion 101 is heated and cured.
  • a heating condition of the first conductive material 110 can be suitably set according to the composition of the first conductive material 110 or the like.
  • the volume of first conductive material 110 shrinks with a heating treatment.
  • a shape of an inner wall surface of the concave portion 101 is transferred to a portion of the first conductive material 110 which is in contact with the inner wall surface of the concave portion 101, and thus, the portion is in a flat shape.
  • a portion of the first conductive material 110 which is not in contact with the inner wall surface of the concave portion 101 is not affected by the shape of the inner wall surface of the concave portion 101. For this reason, a fine unevenness shape is formed in the portion of the first conductive material which is not in contact with the inner wall surface of the concave portion 101. Accordingly, the first conductor portion 6 is formed.
  • a treatment method of the first conductive material 110 is not particularly limited to heating.
  • the first conductive material 110 may be irradiated with an energy ray such as an infrared ray, an ultraviolet ray or laser light, or the first conductive material 110 may only be dried. Two or more types of treatment methods may be combined.
  • a first resin material 120 for forming the first resin portion 5 is applied onto the first intaglio 100.
  • the resin material described above configuring the first resin portion 5 is used as the first resin material 120.
  • a screen printing method, a spray coating method, a bar coating method, a dipping method and an ink jet method can be exemplified as a method of applying the first resin material 120 on the first intaglio 100. According to such coating, the first resin material 120 enters the concave portion 101 having a gap which is generated by the volume contraction of the first conductive material 110 described above.
  • the substrate 3 is disposed on the first intaglio 100, and the substrate 3 is pressed against the first intaglio 100 in a state where the first resin material 120 is interposed between the substrate 3 and the first intaglio 100. Then, the first resin material 120 is cured. Irradiation of an energy ray such as an ultraviolet ray laser light or an infrared ray laser light, heating, heating and cooling, drying and the like can be exemplified as a method of curing the first resin material 120. Accordingly, the first resin portion 5 is formed.
  • an energy ray such as an ultraviolet ray laser light or an infrared ray laser light
  • a formation method of the first resin portion 5 is not particularly limited to the above description.
  • the first resin portion 5 may be formed by preparing the substrate 3 on which the first resin material 120 is approximately uniformly applied 3, pressing the substrate 3 against the first intaglio 100 so that the first resin material 120 enters the concave portion 101 of the first intaglio 100, and curing the first resin material 120 while maintaining such a state.
  • an intermediate 140 including the substrate 3, the first conductor portion 6 and the first resin portion 5 is released from the first intaglio 100.
  • a second intaglio 150 on which a concave portion 151 corresponding to the shape of the second conductor portion 8 is formed is prepared.
  • the same material as the material of which the first intaglio 100 is made is used as a material of which the second intaglio 150 is made.
  • a release layer (not illustrated) may be formed on the surface of the second intaglio 150 in advance.
  • the second concave portion 151 of the second intaglio 150 is filled with a second conductive material 160 for forming the second conductor portion 8, and the second conductive material 160 is cured.
  • the conductive paste described above is used as the second conductive material 160.
  • the same method as the method of filling the concave portion 101 with the first conductive material is used as a method of filling the second concave portion 151 with the second conductive material 160.
  • the same method as the method of curing the first conductive material 110 is used as a method of curing the second conductive material 160.
  • a second resin material 170 for forming the second resin portion 7 is applied on the intermediate 140 so as to cover the first conductor portion 6.
  • the material of which the second resin portion 7 is made is used as the second resin material 170.
  • a viscosity of the second resin material 170 is 1 mPa ⁇ s to 10,000 mPa ⁇ s, in terms of ensuring sufficient fluidity at the time of coating.
  • a storage elastic modulus of the resin after being cured is greater than or equal to 10 6 Pa and less than or equal to 10 9 Pa, in terms of durability of the first conductor portion 6 or the second conductor portion 8.
  • the same method as the method of applying the first resin material is used as a method of applying the second resin material 170.
  • the intermediate 140 is disposed on the second intaglio 150, and the intermediate 140 is pressed against the second intaglio 150 so that the second resin material 170 enters the second concave portion 151 of the second intaglio 150 (specifically, an air gap which is generated by the volume contraction of the second conductive material 160), and the second resin material 170 is cured.
  • a pressure force at the time of pressing the intermediate 140 against the second intaglio 150 is preferably 0.001 MPa to 100 MPa, and is more preferably 0.01 MPa to 10 MPa.
  • the pressure can be performed by using a pressure roller or the like.
  • the same method as the method of curing the first resin material 120 is used as a method of curing the second resin material 170. Accordingly, the second resin portion 7 is formed, and the intermediate 140 and the second conductor portion 8 are adhesively fixed to each other through the second resin portion 7.
  • the intermediate 140, the second resin portion 7 and the second conductor portion 8 are released from the second intaglio 150. Accordingly, the wiring board 2 can be obtained.
  • the wiring body 4, the wiring board 2 and the touch sensor 1 of this embodiment have the following effects.
  • the touch panel sensor In the touch panel sensor, a technology of configuring the electrode pattern of a plurality of metal thin wires is known. In the touch panel sensor, an area obtained by projecting the metal thin wire on a surface direction of the touch panel sensor is small, and thus, the metal thin wire is hardly visible, and visibility of the touch panel sensor is improved. However, in a process where the metal thin wire is formed, a conductive material may wet-spread due to the own weight or the like after the conductive material configuring the metal thin wire is formed on a substrate and before a curing treatment is performed, and thus, a tip end of the metal thin wire may be in a flared shape.
  • the area obtained by projecting the metal thin wire on the surface direction of the touch panel increases, the metal thin wire is easily visible, and thus, the visibility of the touch panel sensor decreases.
  • light incident from a direction orthogonal to the surface direction of the touch panel sensor scatters on the flared portion of such a metal thin wire, and thus, there is a concern that an increase in a haze is caused. For this reason, a display region is clouded, and thus, there is a concern that the visibility of the touch panel sensor decreases.
  • the tip end of the metal thin wire is in a sharp shape (a pointed shape), and thus, an electrical field intensity increases, and insulation breakdown due to an electrical field concentration (a so-called edge effect) easily occurs at the tip end.
  • the projection electrostatic capacitance type touch panel sensor it is known that two electrode patterns are disposed to intersect with each other in the see-through plan view and the combination pattern is formed in order to prevent degradation in visibility.
  • a touch panel sensor since it is necessary that one electrode pattern is disposed corresponding to the other electrode pattern, a high positional accuracy is required between two electrode patterns.
  • positioning between the electrode patterns is performed by an image processing on the basis of a boundary portion of the metal thin wires configuring the electrode pattern.
  • the tip end of the first conductor portion 6 is not in a flared shape.
  • the relationship of Expression (6) described above is established, and the tip end of the first conductor portion 6 has a precipitous shape in the Z direction with respect to the first upper surface 511 of the first flat portion 51. For this reason, in the plan view, the area of the first conductor portion 6 decreases, and the first conductor portion 6 can be hardly visible. Accordingly, it is possible to improve the visibility of the wiring body 4.
  • the tip end of the first conductor portion 6 is not in the sharp-pointed shape, and thus, it is not necessary to set a safety margin, or it is possible to decrease the safety margin. Accordingly, it is possible to reduce the size of the wiring body 4.
  • the first conductor portion end surface 64 positioned at the tip end of the first conductor portion 6 includes the first arc portion 643. For this reason, it is possible to suppress scattering of light or the like at a portion where the first conductor portion end surface 64 and the first conductor portion side surface 63 are connected to each other. Accordingly, the visibility of the wiring body 4 is further improved.
  • a stress is easily concentrated on the conductor portion due to the influence of the height, compared to a conductor portion having a height of nm order.
  • a surface direction is greatly changed at a connection portion between the conductor portion and the resin portion, and thus, a stress is easily concentrated on the connection portion between the conductor portion and the resin portion. Accordingly, there is a possibility that a crack or peeling occurs in the connection portion between the conductor portion and the resin portion.
  • the first convex portion 52 is disposed on the first resin portion 5, the first conductor portion end surface 64 and the convex portion end surface 522 are continuously connected to each other, and the first conductor portion 6 and the first convex portion 52 are formed to satisfy the relationship of Expression (9) described above in this embodiment.
  • the first conductor portion 6 is configured of the binder resin and the conductive particles, it is possible to improve adhesiveness between the first conductor portion 6 and the first resin portion 5, and to further suppress the occurrence of a crack or peeling at the connection portion between the first conductor portion 6 and the first resin portion 5.
  • the first conductor portion end surface 64 and the convex portion end surface 522 are continuously connected to each other, and therefore, a difference is hardly formed in an interface between the first conductor portion 6 and the first resin portion 5, it is possible to suppress scattering of light on the interface between the first conductor portion 6 and the first resin portion 5.
  • Expression (9) described above is established, and thus, the convex portion end surface 522 of the first convex portion 52 has a precipitous shape, and in this case, the convex portion end surface 522 extends in a direction intersecting with an electrical field between the adjacent first conductor portions 6, and thus, it is possible to suppress a short circuit between the adjacent first conductor portions 6 due to ion migration.
  • the relationship of Expression (7) described above is established, and thus, in the first conductor portion side surface 63, it is possible to obtain the same functions and effects as the functions and the effects described in the first conductor portion end surface 64. Accordingly, it is possible to further improve the visibility of the wiring body 4.
  • the first conductor portion end surface 64 and the first conductor portion side surface 63 can be smoothly connected to each other, and thus, it is possible to suppress scattering of light or the like at the connection portion therebetween.
  • the first conductor portion 6 includes the first protruding portion 65 which is along the circumference of the first conductor portion top surface 62, and the first protruding portion 65 protrudes towards a side separated from the first resin portion 5. For this reason, the first protruding portion 65 enters the second resin portion 7, and thus, it is possible to suppress peeling between the first conductor portion 6 and the second resin portion 7. In particular, a stress is most likely to be concentrated on the circumference of the first conductor portion top surface 62 where the extending direction of the surface is precipitously changed, and thus, the circumference easily becomes a starting point of peeling.
  • the first protruding portion 65 is disposed along the circumference of the first conductor portion top surface 62, and thus, it is possible to more reliably suppress peeling between the first conductor portion and the second resin portion 7.
  • the first protruding portion 65 is formed, and thus, there is a concern that the visibility of the wiring body decreases.
  • scattering of light easily occurs in the vicinity of the circumference where the extending direction of the surface is precipitously changed. For this reason, even in a case where the first protruding portion 65 is disposed, the first protruding portion 65 rarely affects on the degree of scattering of light on the first conductor portion top surface 62.
  • the wiring body 4 of this embodiment includes the second resin portion 7 and the second conductor portion 8, and a basic configuration of the second conductor portion 8 is the same as that of the first conductor portion 6. For this reason, it is possible to obtain the same functions and effects in the second conductor portion 8 as the functions and the effects described in the first conductor portion 6.
  • the first and second conductor portions 6 and 8 configuring the first and second electrodes 67 and 87 are positioned on the same fifth virtual straight line L 5 in the see-through plan view, the first and second conductor portions end surfaces 64 and 84 are disposed to face each other in the see-through plan view, and the relationship of Expression (10) and Expression (11) described above is established.
  • the first and second conductor portions 6 and 8 do not overlap with each other, and thus, even in a case where the positions of the first and second conductor portions 6 and 8 are slightly shifted from each other in the width direction of the first and second conductor portions 6 and 8, it is possible to suppress forming a thick portion locally.
  • the first and second conductor portions 6 and 8 are maximally close to each other within a range where the first and second conductor portions 6 and 8 do not overlap with each other, and thus, the interval between the first and second conductor portions 6 and 8 is not conspicuous, and it is possible to form one continuous straight line by the first and second conductor portions 6 and 8 on appearance. Accordingly, the visibility of the wiring body 4 is further improved.
  • the touch sensor of this embodiment is the projection electrostatic capacitance type touch panel sensor formed of the wiring body including two conductor patterns, but is not particularly limited thereto, and the present invention can also be applied to a surface (capacitive coupling) electrostatic capacitance type touch sensor formed of one conductor pattern.
  • an inclination angle of the first conductor portion end surface 64 and an inclination angle of the second conductor portion end surface 84 are substantially equal to each other, but are not particularly limited thereto.
  • the inclination angle of the first conductor portion end surface 64 may be greater than the inclination angle of the second conductor portion end surface 84, or the inclination angle of the first conductor portion end surface 64 may be less than the inclination angle of the second conductor portion end surface 84.
  • the metal material or the carbon-based material is used as the conductive material (the conductive particles) configuring the first and second conductor portions 6 and 8, but the conductive material is not particularly limited thereto, and the metal material and the carbon-based material may be used by being mixed.
  • the carbon-based material may be provided on the first conductor portion top surface 62 side of the first conductor portion 6, and the metal material may be provided on the first conductor portion contact surface 61 side.
  • the metal material may be provided on the first conductor portion top surface 62 side of first conductor portion 6, and the carbon-based material may be provided on the first conductor portion contact surface 61 side.
  • the substrate 3 may be omitted from the wiring board 2 in the embodiment described above.
  • the wiring board may be configured such that a peeling sheet is disposed on a lower surface of the first resin portion 5, the peeling sheet is peeled off at the time of mounting the wiring board 2, and the wiring board 2 is adhesively mounted on a mounting target (a film, a surface glass, a deflection plate, a display glass or the like).
  • a resin portion functioning as an adhesive layer may be disposed between the wiring body 4 and the substrate 3.
  • the wiring board 2 may be mounted on the mounting target described above through the resin portion.
  • the mounting target corresponds to an example of the "support body" in the present invention.
  • the first electrode 67 used in the touch sensor is configured of the first conductor portion of the present invention, but a dummy electrode which is electrically separated from the detection electrode may be disposed, and the dummy electrode may be configured of the first conductor portion of the present invention.
  • a dummy electrode for example, is included in the first conductor pattern 66 and is disposed between a side configuring the first wide portion 671 and a side configuring the second wide portion 871 which correspond to each other in the see-through plan view on appearance.
  • the relationship of Expression (10) and Expression (11) described above may be established between the first conductor portion configuring the dummy electrode and the second conductor portion 8 of the second electrode 87.
  • the dummy electrode may be included in the second conductor pattern 86, and the dummy electrode may be configured of the second conductor portion of the present invention.
  • Such a dummy electrode is disposed between the side configuring the first wide portion 671 and the side configuring the second wide portion 871 which face each other in the see-through plan view on appearance.
  • the relationship of Expression (10) and Expression (11) described above may be established between the first conductor portion 6 configuring the first electrode 67 and the second conductor portion configuring the dummy electrode.
  • the dummy electrode may be included in both of the first and second conductor patterns 66 and 86, the dummy electrode included in the first conductor pattern 66 may be configured of the first conductor portion of the present invention, and the dummy electrode included in the second conductor pattern 86 may be configured of the second conductor portion of the present invention.
  • Such dummy electrodes are disposed between the side configuring the first wide portion 671 and the side configuring the second wide portion 871 which face each other in the see-through plan view on appearance.
  • Expression (10) and Expression (11) described above may be established between the first conductor portion 6 configuring the dummy electrode included in the first conductor pattern 66 and the second conductor portion 8 configuring the dummy electrode included in the second conductor pattern 86.
  • the wiring body or the wiring board has been described as being used in the touch sensor, but is not particularly limited thereto.
  • the wiring body may be used as a heater by energizing the wiring body to generate heat according to resistance heating or the like.
  • a carbon-based material having a high comparatively electrical resistance value is used as the conductive particles.
  • a part of the conductor portion of the wiring body is grounded, and thus, the wiring body may be used as an electromagnetic shielding shield.
  • the wiring body may be used as an antenna.
  • the mounting target on which the wiring body is mounted corresponds to an example of the "support body" in the present invention.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Structure Of Printed Boards (AREA)
  • Position Input By Displaying (AREA)
EP17775404.1A 2016-03-30 2017-03-30 Corps de câblage, carte de circuit imprimé et capteur tactile Withdrawn EP3438800A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016067614 2016-03-30
PCT/JP2017/013269 WO2017170870A1 (fr) 2016-03-30 2017-03-30 Corps de câblage, carte de circuit imprimé et capteur tactile

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EP3438800A1 true EP3438800A1 (fr) 2019-02-06
EP3438800A4 EP3438800A4 (fr) 2019-10-23

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US (1) US20200310584A1 (fr)
EP (1) EP3438800A4 (fr)
JP (1) JP6577662B2 (fr)
CN (1) CN108700965A (fr)
TW (1) TWI649767B (fr)
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WO2020169188A1 (fr) * 2019-02-20 2020-08-27 Scrona Ag Ensemble conducteur optiquement transparent à tracés métalliques électriques et capteur tactile le comprenant
US11875004B2 (en) 2019-02-20 2024-01-16 Scrona Ag Optically transparent conductor assembly with electrical tracks and touch sensor comprising the same

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WO2017170870A1 (fr) 2017-10-05
JPWO2017170870A1 (ja) 2018-08-09
TWI649767B (zh) 2019-02-01
EP3438800A4 (fr) 2019-10-23
TW201804481A (zh) 2018-02-01
CN108700965A (zh) 2018-10-23
US20200310584A1 (en) 2020-10-01
JP6577662B2 (ja) 2019-09-18

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